Method of recovery of single color printing ink wastes

Details Method of recovery of single color printing ink wastes Method of recovery of single color printing ink wastes

1993-07-15

1995-04-04

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210724, 210725, 210734, 210737, 210768, 210774, 210917, 101491, 106204, C02F 152

Patent

active

054034949

ABSTRACT:
An improved process is provided for the steam conversion of dilute printer ink washup fluids, and especially those of a single color, in order to permit reuse of the ink fraction of the fluids as reconstituted printing inks. Preferably, the washup fluids are acidified to create a pin floc therein, with a final pH of from about 2-7; the acidified fluid is then contacted with a stream of steam in a hydroheater (16) in order to convert the residual ink fraction and permit reconstitution thereof into printing ink. The acidifying agent is preferably an acid polymer or an inorganic acid such as HCl or H.sub.2 SO.sub.4.

REFERENCES:
patent: 3835045 (1974-09-01), Hussissian
patent: 3868320 (1975-02-01), Hider et al.
patent: 4738785 (1988-04-01), Langston et al.
patent: 4816164 (1989-03-01), Presley
patent: 5200094 (1993-04-01), Hill et al.
patent: 5286390 (1994-02-01), Gray et al.

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